In the ancient past, Muyun, a fairy king, was hidden with a Zhuxian figure for ten thousand years. Upon awakening in the renowned 'Muyun waste' of the southern Yun Empire in the Land of Heaven, he found himself entangled with the mischievous student Miaoxianyu. Muyun effortlessly outwitted Miaoxianyu's schemes, impressing the alchemy masters who sought his guidance. Returning home, Muyun discovers his impending marriage to the cold and venomous Qin Mengyao, destined to die before reaching 20. The union serves political interests, orchestrated by Qin's family. However, swayed by Mu Linchen's allure, Muyun agrees to the marriage under the condition of practicing alchemy.